Geomagnetic storms in 1987
In 1987, the maximum daily Kp reached storm level (Kp 5 or more) on 56 days. 1 days were strong (Kp 7 or more) and 0 extreme (Kp 9).
Max Kp7
Storm days (Kp ≥ 5)56
Strong (Kp ≥ 7)1
Extreme (Kp 9)0
Storm days by month
Strongest storms
| Date | Max Kp | Daily Ap |
|---|---|---|
| July 29, 1987 | 7 | 52 |
| September 25, 1987 | 6 | 46 |
| October 28, 1987 | 6− | 44 |
| September 30, 1987 | 6 | 43 |
| August 26, 1987 | 6 | 40 |
| September 11, 1987 | 5+ | 40 |
| August 25, 1987 | 6 | 39 |
| December 16, 1987 | 6− | 39 |
| September 10, 1987 | 6+ | 38 |
| October 3, 1987 | 6 | 36 |
GFZ Potsdam, Kp index (CC BY 4.0), doi:10.5880/Kp.0001.